Answers

Subtract 6/36 from 7/81

7/81 - 6/36 is -13/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 36 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   7/81 = 7 × 4/81 × 4 = 28/324
3. Likewise, for the 2nd fraction, since 36 × 9 = 324,
   6/36 = 6 × 9/36 × 9 = 54/324
4. Subtract the two like fractions:
   28/324 - 54/324 = 28 - 54/324 = -26/324
5. After reducing the fraction, the answer is -13/162

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